Malicious PDF — malware analysis report

Static analysis result for SHA-256 58207ccf9850a871…

MALICIOUS

PDF

81.3 KB Created: 2021-09-17 14:45:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 000d878303b4923c14ead989443c5984 SHA-1: 58f91f3bd97cefdab23b2b2faa3df825a60c2151 SHA-256: 58207ccf9850a871acad396fce01f784a6af5cdb8005dc090b29699842f293f8
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF contains embedded JavaScript and multiple external links, some of which point to compromised WordPress sites. The 'SE_CLICKFIX' heuristic indicates the document likely instructs the user to execute a command, a common tactic for social engineering attacks. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to download and execute a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://alpes-de-haute-provence.proximeo.com/ckfinder/userfiles/files/vejizavopazirelaz.pdf In PDF document text
    • https://shreenatharcade.com/userfiles/file/60079045220.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f8532890a7---47820192125.pdfIn PDF document text
    • http://webinaris.eu/ckfinder/userfiles/publics/files/lizazumotobode.pdfIn PDF document text
    • https://rais.bg/uploads/file/gasadokizedakidupo.pdfIn PDF document text
    • http://abwingsva.com/uploads/files/9347936374.pdfIn PDF document text
    • https://em.heephong.org/ethnicminorities/cmsadmin/ckfinder/files/rovasefazozete.pdfIn PDF document text
    • http://beijingxinzhi.com/userfiles/file/20210901052306_2125871976.pdfIn PDF document text
    • http://evergreendentistryva.com/app/webroot/js/ckfinder/userfiles/files/4299194976.pdfIn PDF document text
    • http://gabinetortodontyczny.eu/userfiles/file/rasupu.pdfIn PDF document text
    • http://aquamedia.cn/ckfinder/userfiles/files/873210856.pdfIn PDF document text
    • https://clearpatth.com/userfiles/file/40084197296.pdfIn PDF document text
    • http://staropolski.net/Upload/file/manazeparasoromosa.pdfIn PDF document text
    • http://fasson.vip/images/editor/files/95804506250.pdfIn PDF document text
    • http://ybshajiang.com/userfiles/file/2021-09-03/210903135600557736do3pgnczwkjx.pdfIn PDF document text
    • http://izhar-energy.com/userfiles/file/11854952890.pdfIn PDF document text
    • http://transportdiverse.com/uploads/files/51128159204.pdfIn PDF document text
    • http://aromata.ru/upload/files/76123507437.pdfIn PDF document text
    • http://mail-ex.net/userfiles/file/lilazupo.pdfIn PDF document text
    • https://totalsewa.com/userfiles/file/55243756596.pdfIn PDF document text
    • http://melabo.com/upload/files/dejonafizomip.pdfIn PDF document text
    • http://lexxyin.net/files/fckeditor/file/28288036336.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1613b747268a87---32762280929.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/b3kh2bodf1pcbd0edbt7f8laq4/gixakelijajinepisaganav.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=android+cdc+driver+windows+10+64+bitPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d667.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD667 10848 bytes
SHA-256: b350bbee21052fcdeb94bbd5072b492d104fc7adbef74eb5b712350b378b00d7
font_01_sfnt_off0000efb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB7 18760 bytes
SHA-256: 43e19cdfb8b13e0683f1f6a088edebb0b69e75d469f61499c0b7320f6ea96d42
font_02_sfnt_off00011fd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FD8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.